# Relationship history for MSHA mine 2600460

Current hierarchy: **Guy M  Wells → Wells Cargo Inc → Wells Cargo Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Wells Cargo Inc → Wells Cargo Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Howard A  Wells → Wells Cargo Inc; 1950-01-01 to 2013-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Howard A  Wells → Wells Cargo Inc; 1950-01-01 to 2013-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Guy M  Wells → Wells Cargo Inc; 2013-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guy M  Wells → Wells Cargo Inc; 2013-12-31 to current/open; source msha-controller-operator-history